Eyepatch

An eyepatch or eye pad is a small patch that is worn in front of one eye. It may be a cloth patch attached around the head by an elastic band or by a string, or an adhesive bandage. It is often worn by people to cover a lost or injured eye, but it also has a therapeutic use in children for the treatment of amblyopia. (See orthoptics and vision therapy.) Eyepatches used to block light while sleeping are referred to as a sleep mask.